SQLite has features found in higher-end databases such as full-text indexing and support for JSON data. Application data typically stuffed into semi-structured formats like YAML or XML can be stored as SQLite tables, allowing the data to be accessed more easily and processed more quickly. SQLite supports transactions and atomic behaviors, so a program crash or even a power outage won’t leave you with a corrupted database. The most common and obvious use case for SQLite is serving as a conventional, table-oriented relational database.
Sqlite visual studio code code#
In addition, third parties have written a wide variety of ORMs and data layers that use SQLite, so you’re not stuck accessing SQLite via raw SQL strings (which is not only clumsy but also potentially dangerous).įinally, the source code for SQLite is public domain, so it can be reused in other programs with no practical restrictions. Python, for instance, bundles the SQLite library as a standard-issue element with the stock version of the Python interpreter. Many languages have high-level bindings for SQLite as a library, and can use that in conjunction with other database access layers for the language. SQLite’s binaries are self-contained, so they require no particular magic to deploy-they can simply be dropped into the same directory as the application.
Close the top level for loop, the SLiteConnection object, and the current method.Apps that use SQLite don’t have to be written in any particular language, as long as there is some way to bind and work with external libraries written in C.Close the foreach loop and a writeline method to help you separate all the information according to row:.Prints the name of the column and the value of the row relative to the column You must print out each column and value of the schema table:.Next, define a foreach that will loop through the schema (data) table’s columns:įoreach (DataColumn col in dataTable.Columns).Create an object to represent the current row in the for You will fetch the row using the schema table:.First, you must define a for loop that uses the rows to loop through the schema table:įor (int i = 0 i < i++) Now, you must iterate through the table, row by row and column by column to fetch and view all the data from the schema table.You have to use a DataTable to represent your schema table:ĭataTable dataTable = sqlite_datareader.GetSchemaTable() Working with SQLite Schema tables is a bit tricky. You can then use the SQLiteDataReader object to fetch a schema table.SQLiteDataReader sqlite_datareader = sqlite_cmd.ExecuteReader() Next, you must fetch an SQLiteDataReader from the command:.SQLiteCommand sqlite_cmd = conn.CreateCommand() You will first be required to create a command that retrieves everything from your table:.Static void GetTableInfo(SQLiteConnection conn) It returns Void and accepts an SQLiteConnection object as its only parameter: Create a new static method called GetTableInfo.Your method’s code should look identical to the following: Add a closing curly bracket to the method.Next, you will use the ExecuteNonQuery method to execute the creation command.The second column accepts varying character data that has a limit of twenty characters (VARCHAR(20)). The first column accepts integer types and acts as a primary key.
However, before it creates the said table, it checks if it exists. The above command creates a table called ‘myTable’.
First, you must define the table creation command text:ĬommandText = “CREATE TABLE IF NOT EXISTS myTable (Col1 INT Primary Key, Col2 VARCHAR(20))” ” In this case, you will execute one that creates a table.
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